GL.iNet GL-MT3000 up to 4.4.5 Online Firmware Upgrade one_click_upgrade command injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.9$0-$5k2.19

Summaryinfo

A vulnerability, which was classified as critical, has been found in GL.iNet GL-MT3000 up to 4.4.5. Affected by this issue is some unknown functionality of the file /usr/bin/one_click_upgrade of the component Online Firmware Upgrade Handler. Performing a manipulation results in command injection. This vulnerability was named CVE-2026-12187. The attack may be initiated remotely. In addition, an exploit is available. It is advisable to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Detailsinfo

A vulnerability was found in GL.iNet GL-MT3000 up to 4.4.5. It has been classified as critical. This affects an unknown functionality of the file /usr/bin/one_click_upgrade of the component Online Firmware Upgrade Handler. The manipulation with an unknown input leads to a command injection vulnerability. CWE is classifying the issue as CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-12187. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details and a public exploit are known. MITRE ATT&CK project uses the attack technique T1202 for this issue.

The exploit is shared for download at github.com. It is declared as proof-of-concept. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Upgrading to version 4.7 eliminates this vulnerability. The upgrade is hosted for download at fw.gl-inet.com.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 7.9

VulDB Base Score: 8.8
VulDB Temp Score: 7.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Command injection
CWE: CWE-77 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: GL-MT3000 4.7

Timelineinfo

06/14/2026 Advisory disclosed
06/14/2026 +0 days VulDB entry created
06/14/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-12187 (🔒)
GCVE (CVE): GCVE-0-2026-12187
GCVE (VulDB): GCVE-100-370833
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/14/2026 08:35
Changes: 06/14/2026 08:35 (59)
Complete: 🔍
Submitter: strforexc
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #815654: GL.iNet GL-MT3000 4.4.5 Command Injection (by strforexc)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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